Paper roll chuck



April 9, 1940. F. P. BENNETT PAPER ROLL CHUCK Filed June .5, 1937 INVENTOR l BY MJ' ATTORNEY Perented Apr. 9, 1940 y UNITED STATES PATENT* OFFICE PAPER aou. CHUCK Franklin Pierce Bennett, Seattle, Wash. `Applieatilm June 5, 1997. serial No. 146,569

1 Claim.

This invention relates to clamping and chucking devices, more especially to the type of chuck that is used for clamping rolls of paper to shafts such as is done for printing presses.

The object is to provide a chuck that is simple, eicient, easily as Well as quickly operated.

While there are many chucks on the market for this purpose most of themhave serious objections, some do not center praperly or are injurious to the shaft or paper, some need special wrenches which are easily misplaced or lost and some do not clamp properly. Still others are slow and cumbersome to manipulate whentime is a big factor. I accomplish these and other objects by the peculiar arrangement and combination of parts as will be more fully explained .in the accompanying specifications shown in the drawing and nally pointed out in the appended claim.

Fig. 1 is a side view of my chuck.

Fig. 2 is a left end viewof Fig. 1 ywith parts broken away.

Fig. 3 is a right end Viewof Fig. 1.

Fig. 4 is a section upon line 4-4 of Fig. 3.

Fig. 5 is a View similar to Fig. 3 but shows the chuck expanded.

Fig. 6 is a perspective of one of the leaves.

Referring now more particularly to the drawing, reference numeral I0 represents the body of my device in its entirety. The head end of the body consists of a square portion II with an adjoining cylindrical portion I2. The square portion II is provided with a hole I3'the top end of which is diminished in size as shown at I4 and terminates in a round hole I5 leaving a shoulder pansible and contractible, divided, cam-sleeve is mounted on the bearing sleeve, which cam sleeve comprises three segmental leaves 22, each located between a pair cf adjoining lobes I9. At their inner ends, each leaf is fashioned with an arcuate, exterior, flange or shoulder 23, and these flanges fit loosely in the annular recess I'I of they head. The leavesv are loosely held in place by means of an encircling Aretainer ring 24 which is slipped into the groove or recess I'I and clamped in place by means of set screws 25. The

(c1. mre) hole in, the retainer ring 24 is.v enlarged Iand of suiiicient diameter to permit the leaves 22 to be rotated ontol the lobes I8 of the bearing sleeve I8,

thus expanding the chuck (Fig. 5).

Slidably 'mounted in hole I3 is a clamping block 26 (Figs. 1 and 2) which is cut away at one corner as at 21 tothe same radius as the it is evident that the face '21 of the clamping block 26 will be drawn tightly up against the shaft and by its wedging action the block rigidly,v

the spring 29 will force the clamping block 26 away from the shaft consequently releasing the chuck. I

yThe method of operation is as follows-The .chuck is slipped into the core of the roll of paper, as indicated by the dot and dash lines 38,

(Figs. 4 and 5) after the roll has been placed on the shaft. The clamping screw 28 is now drawn up and thev chuck securely clamped to the shaft as previously described. The body of the chuck is then given a slight rotation in the opposite direction to which the; paper roll is to be rotated, expanding the leaves and clamping the chuck in the core of the paper roll. take the positionv shown bythe solid lines (Fig. 5) and upon continued rotation take the position as indicated by the dotted lines so that the entire surface of the leaves bear against the inner sur-'- faces of the core of the paper roll. The rotation of the paper roll inthe direction indicated by the arrow (Fig. 5) only tends to more securely clamp the chuck in the core.

From the design of the cam and leaves it is` evident that the chuck is adaptable for either direction of rotation of the paper roll.

Having shown and' described a particular form of embodiment of my invention, I am aware that many minor changes willreadily suggest themselves to those skilled in'` the art without departing from the spirit and scope of. my invention. I therefore desire to avoid being limited to the particular form which I have hereinabove shown and described. I thus have described my invention, which I claim is new, and desire to protect by First the leaves Bennett paper roll chuck.

I claim: In an expansion chuck for use with a paper roll and its shaft, the combination with a bearing sleeve having an integral head and a socket in the head extending transversely of the sleeve, of

a clamping block mounted in the socket and' having a face concentric with the bore of the sleeve, a screw-bolt rotatable in the head and threaded in the inner end of the' block whereby Letters Patent said` invention, to be known as FRANKLIN PIERCE BENNETT. 10 

